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Figure 5 is a velocity/time graph for a lift moving upwards in a tall building - Edexcel - GCSE Physics Combined Science - Question 3 - 2023 - Paper 1

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Figure 5 is a velocity/time graph for a lift moving upwards in a tall building. **a)** What is the maximum velocity of the lift? **b)** Calculate the total distanc... show full transcript

Worked Solution & Example Answer:Figure 5 is a velocity/time graph for a lift moving upwards in a tall building - Edexcel - GCSE Physics Combined Science - Question 3 - 2023 - Paper 1

Step 1

What is the maximum velocity of the lift?

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Answer

The maximum velocity of the lift can be observed directly from the velocity/time graph presented in Figure 5. The graph indicates that the maximum velocity reaches 5 m/s, as represented by the height of the horizontal lines on the graph.

Step 2

Calculate the total distance traveled by the lift in 24 seconds.

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Answer

To find the total distance traveled by the lift, we will apply the formula for distance based on velocity and time:

extDistance=extVelocityimesextTime ext{Distance} = ext{Velocity} imes ext{Time}

The lift has primarily three segments of movement:

  1. From 0 to 6 seconds, the lift moves at 5 m/s for 6 seconds:

    extDistance1=5extm/simes6exts=30extm ext{Distance}_1 = 5 ext{ m/s} imes 6 ext{ s} = 30 ext{ m}

  2. From 6 to 12 seconds, the lift moves at 0 m/s (stationary) for 6 seconds:

    extDistance2=0extm/simes6exts=0extm ext{Distance}_2 = 0 ext{ m/s} imes 6 ext{ s} = 0 ext{ m}

  3. From 12 to 18 seconds, the lift again moves at 5 m/s for another 6 seconds:

    extDistance3=5extm/simes6exts=30extm ext{Distance}_3 = 5 ext{ m/s} imes 6 ext{ s} = 30 ext{ m}

  4. From 18 to 24 seconds, the lift moves downward at -5 m/s for 6 seconds:

    extDistance4=5extm/simes6exts=30extm ext{Distance}_4 = -5 ext{ m/s} imes 6 ext{ s} = -30 ext{ m}

Now, add the distances together to calculate the total distance:

extTotalDistance=extDistance1+extDistance2+extDistance3+extDistance4 ext{Total Distance} = ext{Distance}_1 + ext{Distance}_2 + ext{Distance}_3 + ext{Distance}_4

Substituting the values gives:

extTotalDistance=30extm+0extm+30extm30extm=30extm ext{Total Distance} = 30 ext{ m} + 0 ext{ m} + 30 ext{ m} - 30 ext{ m} = 30 ext{ m}

Thus, the total distance traveled by the lift in 24 seconds is 30 meters.

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